BENDIX BW1444 Manuel D’Utilisation

®

The TW-N

™

 valve is a manually operated two position control

valve. It is normally dash or panel mounted and incorporates
a manually operated control lever. The TW-N

™

 valve was

designed for use as a control for non-modulating air system
devices.

With the exception of the plunger return spring, lever pin
and lever reinforcement the TW-N

™

 valve is constructed of

nonmetallic material.

The single supply port and delivery port are both tapped with
a 1/8" female pipe thread to accommodate air connections.
A single .26" (6.6 mm) O.D., unthreaded exhaust nipple is
located on the side and midway down the valve body. Each
port is identified with embossed letters; SUP for supply,
DEL for delivery and EXH for the exhaust.

The TW-N

™

 valve is generally mounted using two of the four

mounting holes that are provided. All four mounting holes
are tapped with a 10-24 thread.

The TW-N

™

 valve is interchangeable with the TW-1

™

 two-way

control valve with respect to vehicle fit and function. Dial
plates and attaching screws can be used interchangeably
on either the TW-N

™

 and TW-1

™

 valves, however other detail

components are not interchangeable.

With the TW-N

™

 valve in the exhaust position, air at the

supply port is prevented from flowing to the delivery port by
the lower o-ring on the plunger. (Figure 2) When the lever is
moved to the delivery position, (Figure 3) the return spring
and air pressure moves the plunger allowing the lower plunger
o-ring to slide past the delivery port passage. With the plunger
in this position (Figure 3), air flows from the supply port and
out the delivery port.

DELIVERY

PORT

1/8” P.T.

MOUNTING

HOLE (4)

SUPPLY

PORT

1/8” P.T.

EXHAUST

.26” O.D.

(6.6 MM)

LEVER

LEVER PIN

DELIVERY

PORT

SUPPLY

PORT

SPRING

O-RING (SMALL)

BODY

O-RING (LARGE)

PLUNGER